Sheave



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IVI. E. NEENAN.

SHEAVE FILED Aue.17,192|.

uvam-fox. cwMLchaeLENeenm. V (9./ F04* iran sraras MICHAEL E. NEENAN, 0F NE'W YORK, N. Y., ASSGNOR 'IO NEENAN ELEVATOR CORPO- RATION, A CORPORATION 0F 'NEW YORK.

Application led August 17, 1921.

To all whom it may concern.'

Be it known that I, MICHAEL E. NnnNAN, a citizen of the United States, and a resident of the. city of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Sheaves, of which the following is a speciiication.

The invention relates to improvements in sheaves applicable to elevator utilities, havingassociated therewith a radially disposed fiber peripheral traction tread arranged to receive ropes and cables of any material which latter forms their own grooves on frictional engaging surfaces.

Une obj ect of the invention is the providing of a peripheral traction tread for sheaves or like articles of manufacture, made up of a plurality of twisted tarred liber portions or other` like material radially disposed with relation to the aXis of the sheave, and permanently pressed into position upon the reception drum of said sheave by means of a locking or clamping plate in order to insure an increased traction gripping and wear resisting surface.

Another object of the invention resides in the fact, that by providing a traction tread of the type as set forth, that cables and other like units of sustenance7 wear or cut their own grooves or channels therein, and by reason of the difference in material, retard wear and injury to the engaging faces of the units, and further a traction tread that when worn out, and requiring readjustment, such parts may be discarded and an entire new tread supplied at very little cost and trouble.

In the 'following is described in connection with the accompanying drawings, one embodiment o-f the invention, the features thereof being more practically pointed out hereinafter in the claims.

In the drawings, Fig. l is an end view of a sheave part thereof being shown in vertical sectional view illustrating the invention lafter the grooves have been cut therein by reason of the engagement therewith of cables, ropes, etc.; Fig. 2 is adetail vertical sectional view of the sheave and fiber frictional tread illustrating the disposition of the units of material comprised in said tread and Fig. 3 is an elevation of a sheave part of its edge being broken away to show the Serial No. 492,896.

peripheral tread of fibrous material applied thereto.

Similar numerals of reference indicate similar parts throughout the several views.

In the drawings l designates the body of a sheave comprising a sleeve core 2 having formed therein an aperture 3 arranged to receive. a shaft and a series of spokes 4 carrying at their outer ends a female drum 5 provided at its edge with a channeled shoulder 6. The inner wall of shoulder 6 is tapered inwardly at 7 to form a reception housing for the peripheral fiber tread.

8 indicates a locking plate provided with a channeled shoulder 9 and a tapering wall 10 to form the outer side of the sheave channel l1.

l2 designates a multiplicity of liber rope ends, set on their respecting encs on the housing formed by the female drum 5 and the tapered inner walls 7 and 10 of the cable housing or channel 117 and when said fiber ends are properly disposed thereon` a series of bolts 18 are inserted in holes 14e and nuts 15 placed thereon, and the plate 8 is forced inwardly to a proper tension, the compression created by seating said locking plate 8 causes the fibrous fillers to become a compact hardened tractional tread, with a flush wear resisting surface 16. Said surface 16 within channel l1 is depressed between the respective shoulders of the sheave, thereby providing guides for the units operative connection therewith. lThe action on said tread by cables, ropes or sheave actuating units, form in said peripheral tread grooves .1 7 in which said units run until the fibrous filler is worn out or destroyed, at which time an entire new tread may be inserted with a minimum of time and expense.

The invention may be varled 1n many ways, and diverse materials may be'used, without departing from the general spirit of the invention.

vWhat is claimed and desired to secure by Letters Patent of the United States is:

1. A device of the character described comprising a sheave supporting body, a reception drum formed thereon, a series of twisted tarred rope ends set radially to the .axis of said drum adapted to form a peripheral traction tread therefor, and a locking plate ,mounted on lsaid drum and engaging Seid traction tread arranged to hold said ed on said drum and engaging said tread lo tread in position thereon. adapted to compress said ti'emdl into ,substan- 2. A device of the character described im tially a, solid fibrous mass into which a oluding a peripheral traction tread 'for vplurality of cables may form a plurality of 5 sheaves, comprising i :i plurality. of twisted grooves.

tarred rope ends disposed radially .with re-` Signed atNeW York city, in the county of 15 lation to the axis of said sheave, a reception New York and State of New York this 12th drum formed on said sheave adapted to veday oi August A. D. 1921. ceive said tread, and a locking plete mo-unt- MCHAEL E. NEENAN. 

